Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

Pls answer fast... In a resistive circuit, if the current is increased to two times the percentage change in the amount of heat dissipated in the circuit would be a) 400% b) 300% c) 200% d) 100%
Asked by anubhutiupadhaya | 04 Mar, 2023, 15:16: PM
answered-by-expert Expert Answer
Heat dissipated in circuit is directly proportional to square of current and resistance. 
According to Joule's law of heating, 
H =I2Rt ...(1)
If current is increased to two times, 
Heat dissipated H' = (2I)2 Rt = 4I2Rt ...(2) 
 
Thus, 
percentage change in amount of heat dissipated will be, 
 
 percent sign space c h a n g e space i n space h e a t space d i s s i p a t e d space equals space open parentheses fraction numerator H apostrophe minus H over denominator H end fraction close parentheses cross times 100 equals open parentheses fraction numerator 4 I squared R t space minus space I squared R t over denominator I squared R t end fraction close parentheses cross times 100 equals fraction numerator 3 left parenthesis I squared R t right parenthesis over denominator left parenthesis I squared R t right parenthesis end fraction cross times 100 equals 3 cross times 100 space equals 300  
 
Correct option -> b) 300%
Answered by Shiwani Sawant | 04 Mar, 2023, 15:28: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
Pls answer fast... In a resistive circuit, if the current is increased to two times the percentage change in the amount of heat dissipated in the circuit would be a) 400% b) 300% c) 200% d) 100%
Asked by anubhutiupadhaya | 04 Mar, 2023, 15:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Two wires of copper have the same length but cross-sectional area in the ratio of 3:1. The resistance of the thicker wire is 12 ohm. (a) Calculate the resistance of the thinner wire. (b) Find the equivalent resistance of both these wires, when they are connected (1) in series (ii) parallel (c) If both the wires are connected in parallel to a battery of 24 volt, then find out the ratio of heat produced in the thicker wire to the thinner wire identify the wire if both of them are connected to the same source for the same time duration.
Asked by swetalinasamantaray022 | 20 Jan, 2023, 10:54: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Question is attached in the image. Please help me.
question image
Asked by hemaborate26 | 27 Apr, 2021, 15:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
state joule laws of heating
Asked by mr.bhaveshsadana | 26 Mar, 2021, 13:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
the electric heater is rated at 2 kilowatt electrical energy cost 4 rupees per kilowatt hour what is the cost of using the heater of 3 hours
Asked by 86047357aa | 07 Feb, 2021, 22:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Write joules law of heating
Asked by gmsaivenkat | 06 Dec, 2020, 21:08: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Please answer the question
question image
Asked by vermakkajal330 | 17 Jul, 2020, 16:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
An electric bulb draws a current of 8A and works on 250 volt on the average 8 hours a day find the power consumed by co. consumed by the bulb and find if the electric distribution company is the meaning
Asked by nannappa951 | 11 Jul, 2020, 12:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Q8. An electric bulb is marked 18watt-240 volt. If it is used across 240 V power line for one hour daily, calculate the number of days to consume 1 unit of electric energy.  
Asked by Khekaleaarya | 07 Jul, 2020, 20:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
A electric rerfrigerator rated 400 watt generator 8hour/day.what is th cost of energy to operate it for 30 days at rs.3.00 per kwh  
Asked by himanglodhi2 | 12 May, 2020, 09:52: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Customised test packs for Teachers, Parents, and Students. Click here for details!
×